Ontario, California, United States
Current time in United States
Time zone: PDT (UTC/GMT -07:00) — America/Los_Angeles
| Local Clock Offset: Yesterday, -7 H |
| Time zone: (UTC/GMT -07:00) America/Los_Angeles |
Current Time in other Cities of United States
| New York City |
| Los Angeles |
| Chicago |
| Queens |
| San Antonio |
| The Bronx |
| San Jose |
| Fort Worth |
| Indianapolis |
| San Francisco |
| San Francisco |
| Seattle |
| El Paso |
| Oklahoma City |
| Detroit |
| Boston |
| New South Memphis |
| Las Vegas |
| Milwaukee |
| South Boston |
| Albuquerque |
| Tucson |
| Sacramento |
| Omaha |
| Kansas City |
| Mesa |
| Staten Island |
| Colorado Springs |
| Virginia Beach |
| Tulsa |
What time zone is Ontario in?
If you need the offset: Ontario is on PDT, 7 hours behind UTC, i.e. UTC-07:00. The matching IANA zone is America/Los_Angeles.
Ontario observes daylight saving. The next change lands on Sunday, 01 November 2026, when 1 hour is added or removed and the abbreviation becomes PST.
Bear in mind United States spans 10 zones across the 419 cities we cover — checking a second city in the same country is often necessary.
Time gaps from Ontario right now
Read this as: relative to each city below, Ontario is the stated amount ahead or behind, right now.
| New York | UTC-04:00 | Ontario is 3 hours behind |
| London | UTC+01:00 | Ontario is 8 hours behind |
| Paris | UTC+02:00 | Ontario is 9 hours behind |
| Dubai | UTC+04:00 | Ontario is 11 hours behind |
| Mumbai | UTC+05:30 | Ontario is 12 hours 30 minutes behind |
| Shanghai | UTC+08:00 | Ontario is 15 hours behind |
| Tokyo | UTC+09:00 | Ontario is 16 hours behind |
| Sydney | UTC+10:00 | Ontario is 17 hours behind |
| Sao Paulo | UTC-03:00 | Ontario is 4 hours behind |
When Ontario and other cities overlap
Usable call slots from Ontario, taking business hours as 09:00 to 17:00 in both places.
| New York | 09:00–14:00 in Ontario | 5 hours overlap |
| Sao Paulo | 09:00–13:00 in Ontario | 4 hours overlap |
No shared working window exists with London, Paris, Dubai or Mumbai, so those calls have to sit outside somebody's normal hours.
Cities on the same clock as Ontario
Same zone, same time — each of these sits on America/Los_Angeles alongside Ontario, including through any clock change.
Los Angeles San Jose San Francisco San Francisco Seattle Las Vegas Sacramento Bakersfield
Popular cities
| New York, United States |
| London, United Kingdom |
| Paris, France |
| Tokyo, Japan |
| Beijing, China |
| Sydney, Australia |
| Berlin, Germany |
| Moscow, Russia |
| Dubai, United Arab Emirates |
| Singapore, Singapore |
| Los Angeles, United States |
| Chicago, United States |
| Toronto, Canada |
| Mexico City, Mexico |
| São Paulo, Brazil |
| Mumbai, India |
| Hong Kong, Hong Kong |
| Seoul, South Korea |
| Istanbul, Turkey |
| Cairo, Egypt |
| Lagos, Nigeria |
| Buenos Aires, Argentina |
| Madrid, Spain |
| Rome, Italy |